Sounds good. I'll listen to the First Nations people who have used this technique successfully for over 1000 yrs.
Not trying to argue. I know it isn't a perfect science, but it's one more tool in your arsenal. I have personally tried it dozens of times, and confirmed with a compass. It isn't as simple as looking at one tree and off you go. Most of the time, that one tree is right, but it only makes sense to look around.
Since moss doesn't grow well in the sunlight, you have to make sure the trees you're looking at have a clear line of sight to the sky. Bushes and shadows make it difficult. You're looking for mass. If you're in heavy bush, there will be moss all around, but it will have more mass on the north side that gets no direct sunlight. It's a game of averages, not a one-look, tell-tale hard, fast rule.
Dougo83, if you live in Hippie haven, which I assume is somewhere in BC, I would imagine the moss thing won't have a chance in the dense rain forest there. There's no way the trees would get enough direct sunlight at their base for this technique to work. In sparse boreal forest, or Canadian Shield you'd have better results.
Don't worry about being confrontational. I don't take it that way on the internet. Even when I think I know something, I'm always open to the opinions of folks with experience.